/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label06.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 20:41:32,935 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 20:41:32,941 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 20:41:33,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 20:41:33,006 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 20:41:33,014 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 20:41:33,016 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 20:41:33,022 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 20:41:33,026 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 20:41:33,033 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 20:41:33,035 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 20:41:33,037 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 20:41:33,038 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 20:41:33,042 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 20:41:33,046 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 20:41:33,050 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 20:41:33,051 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 20:41:33,055 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 20:41:33,062 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 20:41:33,071 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 20:41:33,073 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 20:41:33,076 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 20:41:33,077 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 20:41:33,080 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 20:41:33,090 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 20:41:33,090 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 20:41:33,091 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 20:41:33,093 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 20:41:33,094 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 20:41:33,095 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 20:41:33,096 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 20:41:33,097 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 20:41:33,099 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 20:41:33,100 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 20:41:33,101 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 20:41:33,102 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 20:41:33,103 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 20:41:33,103 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 20:41:33,103 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 20:41:33,104 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 20:41:33,105 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 20:41:33,114 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 20:41:33,176 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 20:41:33,177 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 20:41:33,178 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 20:41:33,179 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 20:41:33,179 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 20:41:33,180 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 20:41:33,180 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 20:41:33,180 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 20:41:33,181 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 20:41:33,181 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 20:41:33,182 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 20:41:33,182 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 20:41:33,182 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 20:41:33,182 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 20:41:33,183 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 20:41:33,183 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 20:41:33,183 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 20:41:33,183 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 20:41:33,183 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 20:41:33,184 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 20:41:33,184 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 20:41:33,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:41:33,184 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 20:41:33,184 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 20:41:33,185 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 20:41:33,185 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 20:41:33,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 20:41:33,185 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 20:41:33,185 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 20:41:33,185 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 20:41:33,666 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 20:41:33,693 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 20:41:33,696 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 20:41:33,697 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 20:41:33,698 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 20:41:33,699 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label06.c [2020-10-26 20:41:33,792 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c3b7c0d4c/32f5c4f1643d4575bb87abc808928967/FLAG92b7683c2 [2020-10-26 20:41:34,864 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 20:41:34,865 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem03_label06.c [2020-10-26 20:41:34,886 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c3b7c0d4c/32f5c4f1643d4575bb87abc808928967/FLAG92b7683c2 [2020-10-26 20:41:35,372 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c3b7c0d4c/32f5c4f1643d4575bb87abc808928967 [2020-10-26 20:41:35,375 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 20:41:35,381 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 20:41:35,383 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 20:41:35,384 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 20:41:35,390 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 20:41:35,391 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:41:35" (1/1) ... [2020-10-26 20:41:35,395 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bc7be10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:35, skipping insertion in model container [2020-10-26 20:41:35,395 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 08:41:35" (1/1) ... [2020-10-26 20:41:35,404 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 20:41:35,478 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 20:41:36,166 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:41:36,180 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 20:41:36,613 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 20:41:36,637 INFO L208 MainTranslator]: Completed translation [2020-10-26 20:41:36,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:36 WrapperNode [2020-10-26 20:41:36,638 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 20:41:36,639 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 20:41:36,640 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 20:41:36,640 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 20:41:36,655 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:36" (1/1) ... [2020-10-26 20:41:36,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:36" (1/1) ... [2020-10-26 20:41:36,693 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:36" (1/1) ... [2020-10-26 20:41:36,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:36" (1/1) ... [2020-10-26 20:41:36,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:36" (1/1) ... [2020-10-26 20:41:36,819 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:36" (1/1) ... [2020-10-26 20:41:36,839 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:36" (1/1) ... [2020-10-26 20:41:36,859 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 20:41:36,861 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 20:41:36,861 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 20:41:36,862 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 20:41:36,863 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:36" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 20:41:36,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 20:41:36,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 20:41:36,953 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 20:41:36,954 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 20:41:36,954 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 20:41:36,955 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 20:41:36,955 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 20:41:36,955 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 20:41:36,955 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 20:41:36,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 20:41:36,956 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 20:41:36,956 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 20:41:36,957 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 20:41:36,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 20:41:36,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 20:41:36,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 20:41:36,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 20:41:36,958 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 20:41:36,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 20:41:39,000 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 20:41:39,001 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 20:41:39,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:41:39 BoogieIcfgContainer [2020-10-26 20:41:39,005 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 20:41:39,007 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 20:41:39,007 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 20:41:39,012 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 20:41:39,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 08:41:35" (1/3) ... [2020-10-26 20:41:39,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@424c7420 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:41:39, skipping insertion in model container [2020-10-26 20:41:39,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 08:41:36" (2/3) ... [2020-10-26 20:41:39,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@424c7420 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 08:41:39, skipping insertion in model container [2020-10-26 20:41:39,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 08:41:39" (3/3) ... [2020-10-26 20:41:39,016 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label06.c [2020-10-26 20:41:39,034 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 20:41:39,041 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 20:41:39,076 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 20:41:39,108 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 20:41:39,108 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 20:41:39,109 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 20:41:39,109 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 20:41:39,109 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 20:41:39,109 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 20:41:39,109 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 20:41:39,109 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 20:41:39,136 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states. [2020-10-26 20:41:39,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-26 20:41:39,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:41:39,156 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:41:39,156 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:41:39,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:41:39,164 INFO L82 PathProgramCache]: Analyzing trace with hash 447027728, now seen corresponding path program 1 times [2020-10-26 20:41:39,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:41:39,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703832922] [2020-10-26 20:41:39,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:41:39,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:41:39,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:41:40,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:41:43,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:41:43,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-26 20:41:43,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:41:43,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4167 [2020-10-26 20:41:43,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:41:43,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 20:41:43,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:41:43,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-26 20:41:43,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 20:41:45,530 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:41:45,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:41:45,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:41:45,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:41:45,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:41:45,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:41:45,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:41:45,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-26 20:41:45,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:41:45,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:41:45,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:41:45,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:41:45,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:41:46,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 20:41:46,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703832922] [2020-10-26 20:41:46,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 20:41:46,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-26 20:41:46,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870626227] [2020-10-26 20:41:46,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 20:41:46,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:41:46,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 20:41:46,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:41:46,221 INFO L87 Difference]: Start difference. First operand 315 states. Second operand 12 states. [2020-10-26 20:41:46,811 WARN L193 SmtUtils]: Spent 465.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-26 20:41:47,888 WARN L193 SmtUtils]: Spent 972.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 196 [2020-10-26 20:41:48,924 WARN L193 SmtUtils]: Spent 965.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 196 [2020-10-26 20:41:50,015 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 210 DAG size of output: 204 [2020-10-26 20:41:51,694 WARN L193 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 223 DAG size of output: 203 [2020-10-26 20:41:53,649 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 223 DAG size of output: 202 [2020-10-26 20:41:55,810 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 226 DAG size of output: 201 [2020-10-26 20:41:59,863 WARN L193 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 227 DAG size of output: 200 [2020-10-26 20:42:01,230 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 229 DAG size of output: 198 [2020-10-26 20:42:04,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:42:04,326 INFO L93 Difference]: Finished difference Result 742 states and 1293 transitions. [2020-10-26 20:42:04,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 20:42:04,328 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 176 [2020-10-26 20:42:04,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:42:04,355 INFO L225 Difference]: With dead ends: 742 [2020-10-26 20:42:04,355 INFO L226 Difference]: Without dead ends: 365 [2020-10-26 20:42:04,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2020-10-26 20:42:04,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-10-26 20:42:04,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2020-10-26 20:42:04,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-10-26 20:42:04,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 526 transitions. [2020-10-26 20:42:04,492 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 526 transitions. Word has length 176 [2020-10-26 20:42:04,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:42:04,497 INFO L481 AbstractCegarLoop]: Abstraction has 365 states and 526 transitions. [2020-10-26 20:42:04,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 20:42:04,497 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 526 transitions. [2020-10-26 20:42:04,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-26 20:42:04,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:42:04,517 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:42:04,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 20:42:04,518 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:42:04,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:42:04,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1096463619, now seen corresponding path program 1 times [2020-10-26 20:42:04,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:42:04,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361433524] [2020-10-26 20:42:04,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:42:04,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:04,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:04,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:06,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:09,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:09,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-26 20:42:09,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:42:09,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4941 [2020-10-26 20:42:09,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:09,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:42:09,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:42:09,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 190 [2020-10-26 20:42:09,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:42:10,015 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:42:10,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:42:10,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:10,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:10,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:10,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:42:10,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:10,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-26 20:42:10,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:10,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:42:10,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:42:10,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:42:10,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 20:42:10,223 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:42:10,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:42:10,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:10,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:10,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:10,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:10,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:42:10,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:42:10,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-26 20:42:10,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:10,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:42:10,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:42:10,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:42:10,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:42:10,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 20:42:10,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361433524] [2020-10-26 20:42:10,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:42:10,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:42:10,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096569770] [2020-10-26 20:42:10,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:42:10,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:42:10,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:42:10,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:42:10,445 INFO L87 Difference]: Start difference. First operand 365 states and 526 transitions. Second operand 6 states. [2020-10-26 20:42:10,714 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:42:13,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:42:13,821 INFO L93 Difference]: Finished difference Result 831 states and 1293 transitions. [2020-10-26 20:42:13,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 20:42:13,822 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 187 [2020-10-26 20:42:13,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:42:13,829 INFO L225 Difference]: With dead ends: 831 [2020-10-26 20:42:13,829 INFO L226 Difference]: Without dead ends: 587 [2020-10-26 20:42:13,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:42:13,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-10-26 20:42:13,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 581. [2020-10-26 20:42:13,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 581 states. [2020-10-26 20:42:13,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 780 transitions. [2020-10-26 20:42:13,869 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 780 transitions. Word has length 187 [2020-10-26 20:42:13,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:42:13,870 INFO L481 AbstractCegarLoop]: Abstraction has 581 states and 780 transitions. [2020-10-26 20:42:13,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:42:13,870 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 780 transitions. [2020-10-26 20:42:13,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-26 20:42:13,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:42:13,874 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:42:13,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 20:42:13,874 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:42:13,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:42:13,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1609761449, now seen corresponding path program 1 times [2020-10-26 20:42:13,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:42:13,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741905595] [2020-10-26 20:42:13,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:42:13,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:14,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:14,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:15,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:15,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 209 [2020-10-26 20:42:15,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:42:15,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1579 [2020-10-26 20:42:15,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:15,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:42:15,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:42:15,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 200 [2020-10-26 20:42:15,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:42:15,912 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:42:15,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:42:15,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:15,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:15,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:15,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:42:15,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:15,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-26 20:42:15,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:15,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:42:15,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:42:15,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:42:15,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:16,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:42:16,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:16,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:16,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:16,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:16,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:42:16,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:42:16,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-26 20:42:16,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:16,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:42:16,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:42:16,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:42:16,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:16,249 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 20:42:16,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741905595] [2020-10-26 20:42:16,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:42:16,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 20:42:16,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153374962] [2020-10-26 20:42:16,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 20:42:16,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:42:16,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 20:42:16,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 20:42:16,252 INFO L87 Difference]: Start difference. First operand 581 states and 780 transitions. Second operand 6 states. [2020-10-26 20:42:16,511 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:42:19,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:42:19,667 INFO L93 Difference]: Finished difference Result 1493 states and 2089 transitions. [2020-10-26 20:42:19,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 20:42:19,668 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 197 [2020-10-26 20:42:19,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:42:19,675 INFO L225 Difference]: With dead ends: 1493 [2020-10-26 20:42:19,676 INFO L226 Difference]: Without dead ends: 1033 [2020-10-26 20:42:19,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:42:19,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2020-10-26 20:42:19,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 1015. [2020-10-26 20:42:19,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1015 states. [2020-10-26 20:42:19,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1015 states to 1015 states and 1374 transitions. [2020-10-26 20:42:19,722 INFO L78 Accepts]: Start accepts. Automaton has 1015 states and 1374 transitions. Word has length 197 [2020-10-26 20:42:19,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:42:19,723 INFO L481 AbstractCegarLoop]: Abstraction has 1015 states and 1374 transitions. [2020-10-26 20:42:19,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 20:42:19,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1015 states and 1374 transitions. [2020-10-26 20:42:19,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-10-26 20:42:19,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:42:19,743 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:42:19,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 20:42:19,744 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:42:19,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:42:19,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1541015096, now seen corresponding path program 1 times [2020-10-26 20:42:19,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:42:19,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733378148] [2020-10-26 20:42:19,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:42:19,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:19,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:20,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:20,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:22,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:23,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:23,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 220 [2020-10-26 20:42:23,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:42:23,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3506 [2020-10-26 20:42:23,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:23,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:42:23,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:42:23,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 20:42:23,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:23,602 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:42:23,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:42:23,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:23,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:23,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:23,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:42:23,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:23,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 20:42:23,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:23,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:42:23,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:42:23,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:42:23,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:42:23,773 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-26 20:42:23,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:42:23,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:23,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:23,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:23,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:42:23,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:23,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-26 20:42:23,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:23,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:42:23,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:42:23,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:42:23,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 20:42:23,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:42:23,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:23,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:24,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:24,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-26 20:42:24,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:24,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-26 20:42:24,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:24,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:42:24,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:42:24,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 20:42:24,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:24,149 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:42:24,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733378148] [2020-10-26 20:42:24,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:42:24,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:42:24,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757653765] [2020-10-26 20:42:24,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:42:24,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:42:24,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:42:24,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:42:24,154 INFO L87 Difference]: Start difference. First operand 1015 states and 1374 transitions. Second operand 8 states. [2020-10-26 20:42:24,439 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:42:28,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:42:28,292 INFO L93 Difference]: Finished difference Result 2828 states and 3958 transitions. [2020-10-26 20:42:28,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 20:42:28,293 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 206 [2020-10-26 20:42:28,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:42:28,313 INFO L225 Difference]: With dead ends: 2828 [2020-10-26 20:42:28,313 INFO L226 Difference]: Without dead ends: 1934 [2020-10-26 20:42:28,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:42:28,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1934 states. [2020-10-26 20:42:28,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1934 to 1908. [2020-10-26 20:42:28,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1908 states. [2020-10-26 20:42:28,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 2644 transitions. [2020-10-26 20:42:28,428 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 2644 transitions. Word has length 206 [2020-10-26 20:42:28,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:42:28,429 INFO L481 AbstractCegarLoop]: Abstraction has 1908 states and 2644 transitions. [2020-10-26 20:42:28,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:42:28,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 2644 transitions. [2020-10-26 20:42:28,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-10-26 20:42:28,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:42:28,438 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:42:28,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 20:42:28,438 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:42:28,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:42:28,439 INFO L82 PathProgramCache]: Analyzing trace with hash -805186120, now seen corresponding path program 1 times [2020-10-26 20:42:28,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:42:28,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415866973] [2020-10-26 20:42:28,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:42:28,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:28,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:28,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:30,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:32,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:32,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 228 [2020-10-26 20:42:32,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:42:32,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4010 [2020-10-26 20:42:32,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:32,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:42:32,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:42:32,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 20:42:32,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:32,791 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:42:32,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:42:32,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:32,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:32,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:32,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:42:32,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:32,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 20:42:32,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:32,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:42:32,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:42:32,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:42:32,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:32,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:42:32,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:33,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:33,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:33,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:33,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:42:33,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:42:33,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-26 20:42:33,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:33,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:42:33,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:42:33,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:42:33,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:33,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:42:33,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:33,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:33,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:33,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-26 20:42:33,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:33,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-26 20:42:33,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:33,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:42:33,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:42:33,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 20:42:33,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:33,383 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:42:33,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415866973] [2020-10-26 20:42:33,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:42:33,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:42:33,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286842592] [2020-10-26 20:42:33,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:42:33,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:42:33,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:42:33,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:42:33,385 INFO L87 Difference]: Start difference. First operand 1908 states and 2644 transitions. Second operand 8 states. [2020-10-26 20:42:33,700 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:42:35,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:42:35,602 INFO L93 Difference]: Finished difference Result 3658 states and 5154 transitions. [2020-10-26 20:42:35,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 20:42:35,603 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 214 [2020-10-26 20:42:35,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:42:35,614 INFO L225 Difference]: With dead ends: 3658 [2020-10-26 20:42:35,614 INFO L226 Difference]: Without dead ends: 1871 [2020-10-26 20:42:35,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-26 20:42:35,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2020-10-26 20:42:35,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 1869. [2020-10-26 20:42:35,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1869 states. [2020-10-26 20:42:35,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 2523 transitions. [2020-10-26 20:42:35,718 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 2523 transitions. Word has length 214 [2020-10-26 20:42:35,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:42:35,719 INFO L481 AbstractCegarLoop]: Abstraction has 1869 states and 2523 transitions. [2020-10-26 20:42:35,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:42:35,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 2523 transitions. [2020-10-26 20:42:35,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-10-26 20:42:35,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:42:35,727 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:42:35,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 20:42:35,727 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:42:35,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:42:35,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1862426108, now seen corresponding path program 1 times [2020-10-26 20:42:35,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:42:35,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434873702] [2020-10-26 20:42:35,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:42:35,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:35,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:36,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:37,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:37,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:39,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:39,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 229 [2020-10-26 20:42:39,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:42:39,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4173 [2020-10-26 20:42:39,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:39,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:42:39,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:42:39,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-26 20:42:39,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:40,223 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:42:40,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:42:40,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:40,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:40,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:40,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:42:40,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:40,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 20:42:40,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:40,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:42:40,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:42:40,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:42:40,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:40,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:42:40,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:40,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:40,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:40,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:42:40,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:40,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-26 20:42:40,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:40,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:42:40,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:42:40,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:42:40,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:40,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:42:40,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:40,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:40,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:40,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-26 20:42:40,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:40,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-26 20:42:40,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:40,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:42:40,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:42:40,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 20:42:40,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:40,698 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 20:42:40,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434873702] [2020-10-26 20:42:40,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:42:40,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:42:40,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619946711] [2020-10-26 20:42:40,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:42:40,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:42:40,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:42:40,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:42:40,703 INFO L87 Difference]: Start difference. First operand 1869 states and 2523 transitions. Second operand 8 states. [2020-10-26 20:42:40,952 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:42:44,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:42:44,273 INFO L93 Difference]: Finished difference Result 5414 states and 7534 transitions. [2020-10-26 20:42:44,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 20:42:44,276 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 215 [2020-10-26 20:42:44,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:42:44,300 INFO L225 Difference]: With dead ends: 5414 [2020-10-26 20:42:44,300 INFO L226 Difference]: Without dead ends: 3666 [2020-10-26 20:42:44,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:42:44,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3666 states. [2020-10-26 20:42:44,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3666 to 3621. [2020-10-26 20:42:44,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3621 states. [2020-10-26 20:42:44,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3621 states to 3621 states and 4967 transitions. [2020-10-26 20:42:44,470 INFO L78 Accepts]: Start accepts. Automaton has 3621 states and 4967 transitions. Word has length 215 [2020-10-26 20:42:44,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:42:44,470 INFO L481 AbstractCegarLoop]: Abstraction has 3621 states and 4967 transitions. [2020-10-26 20:42:44,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:42:44,470 INFO L276 IsEmpty]: Start isEmpty. Operand 3621 states and 4967 transitions. [2020-10-26 20:42:44,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-10-26 20:42:44,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:42:44,481 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:42:44,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 20:42:44,481 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:42:44,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:42:44,482 INFO L82 PathProgramCache]: Analyzing trace with hash 164710816, now seen corresponding path program 1 times [2020-10-26 20:42:44,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:42:44,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [185057514] [2020-10-26 20:42:44,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:42:44,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:44,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:45,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:47,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:47,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 236 [2020-10-26 20:42:47,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:42:47,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2627 [2020-10-26 20:42:47,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:47,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 20:42:47,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:42:47,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 20:42:47,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:47,431 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:42:47,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:42:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:47,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:47,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:47,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:42:47,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:47,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 20:42:47,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:47,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:42:47,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:42:47,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:42:47,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:47,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:42:47,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:47,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:47,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:47,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:42:47,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:47,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-26 20:42:47,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:47,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:42:47,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:42:47,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:42:47,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:47,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:42:47,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:42:47,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:42:47,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:42:47,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-26 20:42:47,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:42:47,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-26 20:42:47,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:42:47,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:42:47,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:42:47,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 20:42:47,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:42:48,009 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 41 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:42:48,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [185057514] [2020-10-26 20:42:48,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:42:48,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 20:42:48,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687556492] [2020-10-26 20:42:48,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 20:42:48,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:42:48,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 20:42:48,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-26 20:42:48,013 INFO L87 Difference]: Start difference. First operand 3621 states and 4967 transitions. Second operand 10 states. [2020-10-26 20:42:48,269 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:42:48,954 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 162 [2020-10-26 20:42:50,628 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 164 [2020-10-26 20:42:52,597 WARN L193 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 161 [2020-10-26 20:42:53,864 WARN L193 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 163 [2020-10-26 20:42:55,580 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-26 20:42:57,164 WARN L193 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 160 [2020-10-26 20:42:59,906 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 20:43:00,442 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:43:02,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:43:02,962 INFO L93 Difference]: Finished difference Result 18200 states and 28368 transitions. [2020-10-26 20:43:02,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 20:43:02,963 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 222 [2020-10-26 20:43:02,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:43:03,109 INFO L225 Difference]: With dead ends: 18200 [2020-10-26 20:43:03,110 INFO L226 Difference]: Without dead ends: 14700 [2020-10-26 20:43:03,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=313, Invalid=1169, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 20:43:03,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14700 states. [2020-10-26 20:43:03,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14700 to 14292. [2020-10-26 20:43:03,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14292 states. [2020-10-26 20:43:03,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14292 states to 14292 states and 20287 transitions. [2020-10-26 20:43:03,796 INFO L78 Accepts]: Start accepts. Automaton has 14292 states and 20287 transitions. Word has length 222 [2020-10-26 20:43:03,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:43:03,797 INFO L481 AbstractCegarLoop]: Abstraction has 14292 states and 20287 transitions. [2020-10-26 20:43:03,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 20:43:03,797 INFO L276 IsEmpty]: Start isEmpty. Operand 14292 states and 20287 transitions. [2020-10-26 20:43:03,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-26 20:43:03,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:43:03,812 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:43:03,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 20:43:03,813 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:43:03,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:43:03,814 INFO L82 PathProgramCache]: Analyzing trace with hash 554230205, now seen corresponding path program 1 times [2020-10-26 20:43:03,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:43:03,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461556532] [2020-10-26 20:43:03,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:43:03,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:04,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:04,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:05,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:06,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:06,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 241 [2020-10-26 20:43:06,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 20:43:06,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2364 [2020-10-26 20:43:06,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:06,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 20:43:06,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:43:06,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 206 [2020-10-26 20:43:06,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:06,659 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:43:06,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:43:06,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:06,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:06,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:06,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:43:06,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:06,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 20:43:06,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:06,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:43:06,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:43:06,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:43:06,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:06,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:43:06,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:06,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:06,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:06,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:43:06,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:06,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 20:43:06,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:06,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:43:06,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:43:06,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:43:06,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:06,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:43:06,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:06,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:06,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:07,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:07,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-26 20:43:07,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:43:07,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-26 20:43:07,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:07,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:07,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:07,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 20:43:07,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:07,154 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 34 proven. 27 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 20:43:07,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461556532] [2020-10-26 20:43:07,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:43:07,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:43:07,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368753600] [2020-10-26 20:43:07,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:43:07,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:43:07,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:43:07,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:43:07,157 INFO L87 Difference]: Start difference. First operand 14292 states and 20287 transitions. Second operand 7 states. [2020-10-26 20:43:07,650 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:43:08,777 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-26 20:43:12,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:43:12,937 INFO L93 Difference]: Finished difference Result 46449 states and 69363 transitions. [2020-10-26 20:43:12,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:43:12,938 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 227 [2020-10-26 20:43:12,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:43:13,087 INFO L225 Difference]: With dead ends: 46449 [2020-10-26 20:43:13,088 INFO L226 Difference]: Without dead ends: 32278 [2020-10-26 20:43:13,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:43:13,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32278 states. [2020-10-26 20:43:14,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32278 to 32121. [2020-10-26 20:43:14,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32121 states. [2020-10-26 20:43:14,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32121 states to 32121 states and 44490 transitions. [2020-10-26 20:43:14,166 INFO L78 Accepts]: Start accepts. Automaton has 32121 states and 44490 transitions. Word has length 227 [2020-10-26 20:43:14,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:43:14,167 INFO L481 AbstractCegarLoop]: Abstraction has 32121 states and 44490 transitions. [2020-10-26 20:43:14,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:43:14,167 INFO L276 IsEmpty]: Start isEmpty. Operand 32121 states and 44490 transitions. [2020-10-26 20:43:14,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2020-10-26 20:43:14,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:43:14,189 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:43:14,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 20:43:14,190 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:43:14,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:43:14,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1898754132, now seen corresponding path program 1 times [2020-10-26 20:43:14,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:43:14,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361415162] [2020-10-26 20:43:14,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:43:14,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:14,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:14,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:16,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:17,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:19,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:19,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:19,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 252 [2020-10-26 20:43:19,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:43:19,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5150 [2020-10-26 20:43:19,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:19,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:43:19,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:43:19,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 20:43:19,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:19,654 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:43:19,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:43:19,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:19,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:19,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:19,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:43:19,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:19,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-26 20:43:19,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:19,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:43:19,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:43:19,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:43:19,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:19,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:43:19,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:19,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:19,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:19,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 20:43:19,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:19,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-26 20:43:19,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:19,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:19,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:19,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 20:43:19,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:19,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-26 20:43:19,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:19,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:19,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:19,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-26 20:43:19,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:19,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-26 20:43:19,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:19,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:19,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:19,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 20:43:19,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:20,067 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-26 20:43:20,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361415162] [2020-10-26 20:43:20,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:43:20,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:43:20,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80136814] [2020-10-26 20:43:20,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:43:20,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:43:20,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:43:20,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:43:20,070 INFO L87 Difference]: Start difference. First operand 32121 states and 44490 transitions. Second operand 7 states. [2020-10-26 20:43:20,314 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:43:21,144 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:43:24,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:43:24,201 INFO L93 Difference]: Finished difference Result 90265 states and 130515 transitions. [2020-10-26 20:43:24,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:43:24,202 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 238 [2020-10-26 20:43:24,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:43:24,488 INFO L225 Difference]: With dead ends: 90265 [2020-10-26 20:43:24,489 INFO L226 Difference]: Without dead ends: 58265 [2020-10-26 20:43:24,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:43:24,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58265 states. [2020-10-26 20:43:26,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58265 to 57698. [2020-10-26 20:43:26,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57698 states. [2020-10-26 20:43:27,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57698 states to 57698 states and 79795 transitions. [2020-10-26 20:43:27,232 INFO L78 Accepts]: Start accepts. Automaton has 57698 states and 79795 transitions. Word has length 238 [2020-10-26 20:43:27,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:43:27,233 INFO L481 AbstractCegarLoop]: Abstraction has 57698 states and 79795 transitions. [2020-10-26 20:43:27,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:43:27,233 INFO L276 IsEmpty]: Start isEmpty. Operand 57698 states and 79795 transitions. [2020-10-26 20:43:27,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-10-26 20:43:27,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:43:27,277 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:43:27,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 20:43:27,277 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:43:27,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:43:27,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1523401878, now seen corresponding path program 1 times [2020-10-26 20:43:27,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:43:27,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483705878] [2020-10-26 20:43:27,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:43:27,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:27,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:28,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:29,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:29,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 270 [2020-10-26 20:43:29,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:43:29,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1982 [2020-10-26 20:43:29,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:29,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:29,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-26 20:43:29,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 20:43:29,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:29,698 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:43:29,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:43:29,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:29,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:29,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:29,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:43:29,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:29,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 20:43:29,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:29,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:43:29,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:43:29,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:43:29,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:29,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:43:29,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:29,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:29,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:29,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:43:29,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:29,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-26 20:43:29,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:29,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:43:29,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:43:29,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 20:43:29,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:29,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:43:29,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:29,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:30,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:30,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 20:43:30,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:30,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-26 20:43:30,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:30,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:30,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:30,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 20:43:30,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:30,259 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:43:30,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483705878] [2020-10-26 20:43:30,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:43:30,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 20:43:30,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653835977] [2020-10-26 20:43:30,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:43:30,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:43:30,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:43:30,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:43:30,264 INFO L87 Difference]: Start difference. First operand 57698 states and 79795 transitions. Second operand 7 states. [2020-10-26 20:43:30,763 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:43:32,125 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:43:35,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:43:35,471 INFO L93 Difference]: Finished difference Result 136291 states and 194908 transitions. [2020-10-26 20:43:35,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 20:43:35,471 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 256 [2020-10-26 20:43:35,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:43:36,000 INFO L225 Difference]: With dead ends: 136291 [2020-10-26 20:43:36,001 INFO L226 Difference]: Without dead ends: 78714 [2020-10-26 20:43:36,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 20:43:36,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78714 states. [2020-10-26 20:43:37,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78714 to 77750. [2020-10-26 20:43:37,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77750 states. [2020-10-26 20:43:38,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77750 states to 77750 states and 102671 transitions. [2020-10-26 20:43:38,442 INFO L78 Accepts]: Start accepts. Automaton has 77750 states and 102671 transitions. Word has length 256 [2020-10-26 20:43:38,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:43:38,443 INFO L481 AbstractCegarLoop]: Abstraction has 77750 states and 102671 transitions. [2020-10-26 20:43:38,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:43:38,443 INFO L276 IsEmpty]: Start isEmpty. Operand 77750 states and 102671 transitions. [2020-10-26 20:43:38,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2020-10-26 20:43:38,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:43:38,507 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:43:38,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 20:43:38,507 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:43:38,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:43:38,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1101315957, now seen corresponding path program 1 times [2020-10-26 20:43:38,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:43:38,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152182668] [2020-10-26 20:43:38,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:43:38,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:38,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:39,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:40,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:40,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:40,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:41,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:43,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:43,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 288 [2020-10-26 20:43:43,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 20:43:43,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 20:43:43,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:43,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:43:43,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:43:43,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-26 20:43:43,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:43,913 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:43:43,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:43:43,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:43,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:43,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:43,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:43:43,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:43,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 20:43:43,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:43,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:43:43,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:43:43,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:43:43,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:44,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:43:44,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:44,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:44,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:44,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:44,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-26 20:43:44,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:43:44,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-26 20:43:44,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:44,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:44,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:44,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 20:43:44,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:44,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-26 20:43:44,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:44,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:44,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:44,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 20:43:44,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:44,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-26 20:43:44,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:44,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:44,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:44,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 20:43:44,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:44,699 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-26 20:43:44,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152182668] [2020-10-26 20:43:44,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:43:44,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 20:43:44,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258036423] [2020-10-26 20:43:44,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 20:43:44,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:43:44,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 20:43:44,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 20:43:44,702 INFO L87 Difference]: Start difference. First operand 77750 states and 102671 transitions. Second operand 7 states. [2020-10-26 20:43:44,977 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 20:43:46,485 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-26 20:43:49,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:43:49,073 INFO L93 Difference]: Finished difference Result 176029 states and 235977 transitions. [2020-10-26 20:43:49,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:43:49,073 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 274 [2020-10-26 20:43:49,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:43:49,799 INFO L225 Difference]: With dead ends: 176029 [2020-10-26 20:43:49,799 INFO L226 Difference]: Without dead ends: 98400 [2020-10-26 20:43:49,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 20:43:50,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98400 states. [2020-10-26 20:43:52,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98400 to 98318. [2020-10-26 20:43:52,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98318 states. [2020-10-26 20:43:52,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98318 states to 98318 states and 131739 transitions. [2020-10-26 20:43:52,869 INFO L78 Accepts]: Start accepts. Automaton has 98318 states and 131739 transitions. Word has length 274 [2020-10-26 20:43:52,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:43:52,870 INFO L481 AbstractCegarLoop]: Abstraction has 98318 states and 131739 transitions. [2020-10-26 20:43:52,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 20:43:52,870 INFO L276 IsEmpty]: Start isEmpty. Operand 98318 states and 131739 transitions. [2020-10-26 20:43:52,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-26 20:43:52,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:43:52,965 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:43:52,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 20:43:52,966 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:43:52,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:43:52,968 INFO L82 PathProgramCache]: Analyzing trace with hash -761598285, now seen corresponding path program 1 times [2020-10-26 20:43:52,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:43:52,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978700343] [2020-10-26 20:43:52,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:43:53,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:53,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:53,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:53,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:57,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:58,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:58,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 341 [2020-10-26 20:43:58,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 20:43:58,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-26 20:43:58,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:58,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 20:43:58,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:43:58,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-26 20:43:58,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:58,366 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:43:58,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:43:58,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:58,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:58,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:58,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:43:58,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:58,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 20:43:58,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:58,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:43:58,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:43:58,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:43:58,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:58,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:43:58,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:58,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:58,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:58,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:43:58,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:58,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-26 20:43:58,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:58,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:58,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:58,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:43:58,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:58,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:43:58,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:58,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:58,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:58,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 20:43:58,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:58,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 151 [2020-10-26 20:43:58,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:58,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:43:58,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:43:58,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 20:43:58,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:58,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-10-26 20:43:58,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:43:58,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:43:58,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:43:58,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 20:43:58,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:43:58,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-26 20:43:58,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:43:58,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 20:43:58,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-26 20:43:58,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 20:43:58,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:43:59,008 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 145 proven. 66 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-26 20:43:59,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978700343] [2020-10-26 20:43:59,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:43:59,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:43:59,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781496401] [2020-10-26 20:43:59,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 20:43:59,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:43:59,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 20:43:59,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 20:43:59,010 INFO L87 Difference]: Start difference. First operand 98318 states and 131739 transitions. Second operand 8 states. [2020-10-26 20:43:59,274 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:44:01,469 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:44:04,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:44:04,596 INFO L93 Difference]: Finished difference Result 231692 states and 323638 transitions. [2020-10-26 20:44:04,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 20:44:04,596 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 325 [2020-10-26 20:44:04,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:44:05,744 INFO L225 Difference]: With dead ends: 231692 [2020-10-26 20:44:05,744 INFO L226 Difference]: Without dead ends: 133495 [2020-10-26 20:44:05,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-26 20:44:05,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133495 states. [2020-10-26 20:44:08,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133495 to 132514. [2020-10-26 20:44:08,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132514 states. [2020-10-26 20:44:09,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132514 states to 132514 states and 182101 transitions. [2020-10-26 20:44:09,675 INFO L78 Accepts]: Start accepts. Automaton has 132514 states and 182101 transitions. Word has length 325 [2020-10-26 20:44:09,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:44:09,676 INFO L481 AbstractCegarLoop]: Abstraction has 132514 states and 182101 transitions. [2020-10-26 20:44:09,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 20:44:09,676 INFO L276 IsEmpty]: Start isEmpty. Operand 132514 states and 182101 transitions. [2020-10-26 20:44:09,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-10-26 20:44:09,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:44:09,737 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:44:09,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 20:44:09,737 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:44:09,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:44:09,738 INFO L82 PathProgramCache]: Analyzing trace with hash -2086380946, now seen corresponding path program 1 times [2020-10-26 20:44:09,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:44:09,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692007065] [2020-10-26 20:44:09,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:44:09,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:09,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:10,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:10,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:12,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:13,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:14,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:14,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 344 [2020-10-26 20:44:14,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 20:44:14,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-26 20:44:14,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:14,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 20:44:14,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:44:14,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 161 [2020-10-26 20:44:14,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:15,151 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:44:15,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:44:15,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:15,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:15,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:15,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:44:15,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:15,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 20:44:15,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:15,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:44:15,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:44:15,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:44:15,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:15,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:44:15,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:15,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:15,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:15,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:44:15,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:15,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 20:44:15,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:15,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:44:15,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:44:15,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:44:15,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:15,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:44:15,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:15,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:15,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:15,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 20:44:15,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:15,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-26 20:44:15,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:15,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 20:44:15,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:44:15,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-26 20:44:15,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:15,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-26 20:44:15,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:15,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:15,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:15,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 20:44:15,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:15,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-26 20:44:15,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:15,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:44:15,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:44:15,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 20:44:15,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:15,876 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 153 proven. 4 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-26 20:44:15,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692007065] [2020-10-26 20:44:15,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:44:15,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 20:44:15,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826523851] [2020-10-26 20:44:15,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 20:44:15,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:44:15,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 20:44:15,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-26 20:44:15,878 INFO L87 Difference]: Start difference. First operand 132514 states and 182101 transitions. Second operand 9 states. [2020-10-26 20:44:16,162 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 20:44:16,774 WARN L193 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 161 [2020-10-26 20:44:22,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 20:44:22,763 INFO L93 Difference]: Finished difference Result 304175 states and 419737 transitions. [2020-10-26 20:44:22,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 20:44:22,763 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 328 [2020-10-26 20:44:22,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 20:44:23,389 INFO L225 Difference]: With dead ends: 304175 [2020-10-26 20:44:23,389 INFO L226 Difference]: Without dead ends: 171782 [2020-10-26 20:44:23,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-26 20:44:23,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171782 states. [2020-10-26 20:44:27,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171782 to 171608. [2020-10-26 20:44:27,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171608 states. [2020-10-26 20:44:28,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171608 states to 171608 states and 232333 transitions. [2020-10-26 20:44:28,581 INFO L78 Accepts]: Start accepts. Automaton has 171608 states and 232333 transitions. Word has length 328 [2020-10-26 20:44:28,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 20:44:28,581 INFO L481 AbstractCegarLoop]: Abstraction has 171608 states and 232333 transitions. [2020-10-26 20:44:28,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 20:44:28,582 INFO L276 IsEmpty]: Start isEmpty. Operand 171608 states and 232333 transitions. [2020-10-26 20:44:28,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-26 20:44:28,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 20:44:28,661 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 20:44:28,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 20:44:28,662 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 20:44:28,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 20:44:28,662 INFO L82 PathProgramCache]: Analyzing trace with hash -946173302, now seen corresponding path program 1 times [2020-10-26 20:44:28,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 20:44:28,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707931341] [2020-10-26 20:44:28,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 20:44:28,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:28,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:29,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:33,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:33,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 345 [2020-10-26 20:44:33,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 20:44:33,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4836 [2020-10-26 20:44:33,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:33,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 20:44:33,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 20:44:33,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 253 [2020-10-26 20:44:33,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:34,551 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-10-26 20:44:34,710 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-26 20:44:35,082 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 96 [2020-10-26 20:44:35,527 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 96 [2020-10-26 20:44:36,108 WARN L193 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 99 [2020-10-26 20:44:36,645 WARN L193 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 93 [2020-10-26 20:44:37,084 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 82 [2020-10-26 20:44:37,496 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 71 [2020-10-26 20:44:37,837 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 55 [2020-10-26 20:44:38,097 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 20:44:38,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 20:44:38,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:38,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:38,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:38,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 20:44:38,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:38,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-26 20:44:38,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:38,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 20:44:38,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 20:44:38,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 20:44:38,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:38,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 20:44:38,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:38,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:38,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:38,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-26 20:44:38,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:38,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-26 20:44:38,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:38,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:44:38,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:44:38,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 20:44:38,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:38,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-26 20:44:38,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 20:44:38,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 20:44:39,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 20:44:39,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-26 20:44:39,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 20:44:39,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 522 [2020-10-26 20:44:39,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 20:44:39,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 20:44:39,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 20:44:39,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 145 [2020-10-26 20:44:39,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 20:44:39,797 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-26 20:44:40,257 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 95 [2020-10-26 20:44:41,972 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 56 proven. 103 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 20:44:41,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707931341] [2020-10-26 20:44:41,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 20:44:41,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 20:44:41,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948222607] [2020-10-26 20:44:41,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 20:44:41,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 20:44:41,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 20:44:41,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2020-10-26 20:44:41,977 INFO L87 Difference]: Start difference. First operand 171608 states and 232333 transitions. Second operand 19 states. [2020-10-26 20:44:42,924 WARN L193 SmtUtils]: Spent 727.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 168 [2020-10-26 20:44:43,246 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 27 [2020-10-26 20:44:45,879 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-10-26 20:44:47,080 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2020-10-26 20:44:47,944 WARN L193 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 161 [2020-10-26 20:44:49,550 WARN L193 SmtUtils]: Spent 618.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 71